Groco THT-530 Thru-Hull Installation Tool for 1/2" to 3" Fittings

The Groco THT-530 Thru-Hull Installation Tool simplifies the installation of GROCO thru-hull fittings, allowing a single person to complete the job without assistance. This innovative tool eliminates the need for a second person to hold the fitting in place from inside the hull while securing from the outside.

How It Works:

• Slide the thru-hull fitting over the tool, flanged end first—it will stop at the proper stepped position
• Tie a length of monofilament line to the tool's eye and feed it through the pre-cut hole in the hull
• Pull the fitting into position from outside the boat while guiding it from inside
• Once positioned, secure the fitting and remove the tool

Compatibility: Works with GROCO thru-hull fittings sized 1/2" through 3"

This professional-grade installation tool is essential for boat builders, marine technicians, and DIY boaters who need to install or replace thru-hull fittings efficiently. The stepped design ensures proper alignment and makes solo installation quick and hassle-free.